// Avisynth v2.5.  Copyright 2002 Ben Rudiak-Gould et al.
// http://www.avisynth.org

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA, or visit
// http://www.gnu.org/copyleft/gpl.html .
//
// Linking Avisynth statically or dynamically with other modules is making a
// combined work based on Avisynth.  Thus, the terms and conditions of the GNU
// General Public License cover the whole combination.
//
// As a special exception, the copyright holders of Avisynth give you
// permission to link Avisynth with independent modules that communicate with
// Avisynth solely through the interfaces defined in avisynth.h, regardless of the license
// terms of these independent modules, and to copy and distribute the
// resulting combined work under terms of your choice, provided that
// every copy of the combined work is accompanied by a complete copy of
// the source code of Avisynth (the version of Avisynth used to produce the
// combined work), being distributed under the terms of the GNU General
// Public License plus this exception.  An independent module is a module
// which is not derived from or based on Avisynth, such as 3rd-party filters,
// import and export plugins, or graphical user interfaces.




#ifndef __AVISYNTH_H__
#define __AVISYNTH_H__

enum { AVISYNTH_INTERFACE_VERSION = 3 };


/* Define all types necessary for interfacing with avisynth.dll
Moved from internal.h */

// Win32 API macros, notably the types BYTE, DWORD, ULONG, etc.
#include <windef.h>

#if (_MSC_VER >= 1400)
extern "C" LONG __cdecl _InterlockedIncrement(LONG volatile * pn);
extern "C" LONG __cdecl _InterlockedDecrement(LONG volatile * pn);
#pragma intrinsic(_InterlockedIncrement)
#pragma intrinsic(_InterlockedDecrement)
#define InterlockedIncrement _InterlockedIncrement
#define InterlockedDecrement _InterlockedDecrement
#endif

// COM interface macros
#include <objbase.h>


// Raster types used by VirtualDub & Avisynth
#define in64 (__int64)(unsigned short)
typedef unsigned long	Pixel;    // this will break on 64-bit machines!
typedef unsigned long	Pixel32;
typedef unsigned char	Pixel8;
typedef long			PixCoord;
typedef long			PixDim;
typedef long			PixOffset;


/* Compiler-specific crap */

// Tell MSVC to stop precompiling here
#ifdef _MSC_VER
#pragma hdrstop
#endif

// Set up debugging macros for MS compilers; for others, step down to the
// standard <assert.h> interface
#ifdef _MSC_VER
#include <crtdbg.h>
#else
#define _RPT0(a,b) ((void)0)
#define _RPT1(a,b,c) ((void)0)
#define _RPT2(a,b,c,d) ((void)0)
#define _RPT3(a,b,c,d,e) ((void)0)
#define _RPT4(a,b,c,d,e,f) ((void)0)

#define _ASSERTE(x) assert(x)
#include <assert.h>
#endif



// I had problems with Premiere wanting 1-byte alignment for its structures,
// so I now set the Avisynth struct alignment explicitly here.
#pragma pack(push,8)

#define FRAME_ALIGN 16
// Default frame alignment is 16 bytes, to help P4, when using SSE2

// The VideoInfo struct holds global information about a clip (i.e.
// information that does not depend on the frame number).  The GetVideoInfo
// method in IClip returns this struct.

// Audio Sample information
typedef float SFLOAT;

enum {SAMPLE_INT8  = 1<<0,
    SAMPLE_INT16 = 1<<1,
    SAMPLE_INT24 = 1<<2,    // Int24 is a very stupid thing to code, but it's supported by some hardware.
    SAMPLE_INT32 = 1<<3,
    SAMPLE_FLOAT = 1<<4};

enum {
    PLANAR_Y=1<<0,
    PLANAR_U=1<<1,
    PLANAR_V=1<<2,
    PLANAR_ALIGNED=1<<3,
    PLANAR_Y_ALIGNED=PLANAR_Y|PLANAR_ALIGNED,
    PLANAR_U_ALIGNED=PLANAR_U|PLANAR_ALIGNED,
    PLANAR_V_ALIGNED=PLANAR_V|PLANAR_ALIGNED
};

class AvisynthError /* exception */ {
public:
    const char* const msg;
    AvisynthError(const char* _msg) : msg(_msg) {}
};

struct VideoInfo {
    int width, height;    // width=0 means no video
    unsigned fps_numerator, fps_denominator;
    int num_frames;
    // This is more extensible than previous versions. More properties can be added seeminglesly.

    // Colorspace properties.
    enum {
        CS_BGR = 1<<28,
        CS_YUV = 1<<29,
        CS_INTERLEAVED = 1<<30,
        CS_PLANAR = 1<<31
    };

    // Specific colorformats
    enum { CS_UNKNOWN = 0,
        CS_BGR24 = 1<<0 | CS_BGR | CS_INTERLEAVED,
        CS_BGR32 = 1<<1 | CS_BGR | CS_INTERLEAVED,
        CS_YUY2  = 1<<2 | CS_YUV | CS_INTERLEAVED,
        CS_YV12  = 1<<3 | CS_YUV | CS_PLANAR,  // y-v-u, 4:2:0 planar
        CS_I420  = 1<<4 | CS_YUV | CS_PLANAR,  // y-u-v, 4:2:0 planar
        CS_IYUV  = 1<<4 | CS_YUV | CS_PLANAR   // same as above
    };
    int pixel_type;                // changed to int as of 2.5


    int audio_samples_per_second;   // 0 means no audio
    int sample_type;                // as of 2.5
    __int64 num_audio_samples;      // changed as of 2.5
    int nchannels;                  // as of 2.5

    // Imagetype properties

    int image_type;

    enum {
        IT_BFF = 1<<0,
        IT_TFF = 1<<1,
        IT_FIELDBASED = 1<<2
    };

    // useful functions of the above
    bool HasVideo() const { return (width!=0); }
    bool HasAudio() const { return (audio_samples_per_second!=0); }
    bool IsRGB() const { return !!(pixel_type&CS_BGR); }
    bool IsRGB24() const { return (pixel_type&CS_BGR24)==CS_BGR24; } // Clear out additional properties
    bool IsRGB32() const { return (pixel_type & CS_BGR32) == CS_BGR32 ; }
    bool IsYUV() const { return !!(pixel_type&CS_YUV ); }
    bool IsYUY2() const { return (pixel_type & CS_YUY2) == CS_YUY2; }
    bool IsYV12() const { return ((pixel_type & CS_YV12) == CS_YV12)||((pixel_type & CS_I420) == CS_I420); }
    bool IsColorSpace(int c_space) const { return ((pixel_type & c_space) == c_space); }
    bool Is(int property) const { return ((pixel_type & property)==property ); }
    bool IsPlanar() const { return !!(pixel_type & CS_PLANAR); }
    bool IsFieldBased() const { return !!(image_type & IT_FIELDBASED); }
    bool IsParityKnown() const { return ((image_type & IT_FIELDBASED)&&(image_type & (IT_BFF|IT_TFF))); }
    bool IsBFF() const { return !!(image_type & IT_BFF); }
    bool IsTFF() const { return !!(image_type & IT_TFF); }

    bool IsVPlaneFirst() const {return ((pixel_type & CS_YV12) == CS_YV12); }  // Don't use this
    int BytesFromPixels(int pixels) const { return pixels * (BitsPerPixel()>>3); }   // Will not work on planar images, but will return only luma planes
    int RowSize() const { return BytesFromPixels(width); }  // Also only returns first plane on planar images
    int BMPSize() const { if (IsPlanar()) {int p = height * ((RowSize()+3) & ~3); p+=p>>1; return p;  } return height * ((RowSize()+3) & ~3); }
    __int64 AudioSamplesFromFrames(__int64 frames) const { return (fps_numerator && HasVideo()) ? ((__int64)(frames) * audio_samples_per_second * fps_denominator / fps_numerator) : 0; }
    int FramesFromAudioSamples(__int64 samples) const { return (fps_denominator && HasAudio()) ? (int)((samples * (__int64)fps_numerator)/((__int64)fps_denominator * (__int64)audio_samples_per_second)) : 0; }
    __int64 AudioSamplesFromBytes(__int64 bytes) const { return HasAudio() ? bytes / BytesPerAudioSample() : 0; }
    __int64 BytesFromAudioSamples(__int64 samples) const { return samples * BytesPerAudioSample(); }
    int AudioChannels() const { return HasAudio() ? nchannels : 0; }
    int SampleType() const{ return sample_type;}
    bool IsSampleType(int testtype) const{ return !!(sample_type&testtype);}
    int SamplesPerSecond() const { return audio_samples_per_second; }
    int BytesPerAudioSample() const { return nchannels*BytesPerChannelSample();}
    void SetFieldBased(bool isfieldbased)  { if (isfieldbased) image_type|=IT_FIELDBASED; else  image_type&=~IT_FIELDBASED; }
    void Set(int property)  { image_type|=property; }
    void Clear(int property)  { image_type&=~property; }

    int BitsPerPixel() const {
        switch (pixel_type) {
        case CS_BGR24:
            return 24;
        case CS_BGR32:
            return 32;
        case CS_YUY2:
            return 16;
        case CS_YV12:
        case CS_I420:
            return 12;
        default:
            return 0;
        }
    }

    int BytesPerChannelSample() const {
        switch (sample_type) {
        case SAMPLE_INT8:
            return sizeof(signed char);
        case SAMPLE_INT16:
            return sizeof(signed short);
        case SAMPLE_INT24:
            return 3;
        case SAMPLE_INT32:
            return sizeof(signed int);
        case SAMPLE_FLOAT:
            return sizeof(SFLOAT);
        default:
            _ASSERTE("Sample type not recognized!");
            return 0;
        }
    }

    // useful mutator
    void SetFPS(unsigned numerator, unsigned denominator) {
        if ((numerator == 0) || (denominator == 0)) {
            fps_numerator = 0;
            fps_denominator = 1;
        }
        else {
            unsigned x=numerator, y=denominator;
            while (y) {   // find gcd
                unsigned t = x%y; x = y; y = t;
            }
            fps_numerator = numerator/x;
            fps_denominator = denominator/x;
        }
    }

    // Range protected multiply-divide of FPS
    void MulDivFPS(unsigned multiplier, unsigned divisor) {
        unsigned __int64 numerator   = UInt32x32To64(fps_numerator,   multiplier);
        unsigned __int64 denominator = UInt32x32To64(fps_denominator, divisor);

        unsigned __int64 x=numerator, y=denominator;
        while (y) {   // find gcd
            unsigned __int64 t = x%y; x = y; y = t;
        }
        numerator   /= x; // normalize
        denominator /= x;

        unsigned __int64 temp = numerator | denominator; // Just looking top bit
        unsigned u = 0;
        while (temp & 0xffffffff80000000ull) { // or perhaps > 16777216*2
            temp = Int64ShrlMod32(temp, 1);
            u++;
        }
        if (u) { // Scale to fit
            const unsigned round = 1 << (u-1);
            SetFPS( (unsigned)Int64ShrlMod32(numerator   + round, u),
                (unsigned)Int64ShrlMod32(denominator + round, u) );
        }
        else {
            fps_numerator   = (unsigned)numerator;
            fps_denominator = (unsigned)denominator;
        }
    }

    // Test for same colorspace
    bool IsSameColorspace(const VideoInfo& vi) const {
        if (vi.pixel_type == pixel_type) return TRUE;
        if (IsYV12() && vi.IsYV12()) return TRUE;
        return FALSE;
    }

};




// VideoFrameBuffer holds information about a memory block which is used
// for video data.  For efficiency, instances of this class are not deleted
// when the refcount reaches zero; instead they're stored in a linked list
// to be reused.  The instances are deleted when the corresponding AVS
// file is closed.

class VideoFrameBuffer {
    BYTE* const data;
    const int data_size;
    // sequence_number is incremented every time the buffer is changed, so
    // that stale views can tell they're no longer valid.
    volatile long sequence_number;

    friend class VideoFrame;
    friend class Cache;
    friend class CacheMT;
    friend class ScriptEnvironment;
    volatile long refcount;

public:
    VideoFrameBuffer(int size);
    VideoFrameBuffer();
    ~VideoFrameBuffer();

    const BYTE* GetReadPtr() const { return data; }
    BYTE* GetWritePtr() { InterlockedIncrement(&sequence_number); return data; }
    int GetDataSize() { return data_size; }
    int GetSequenceNumber() { return sequence_number; }
    int GetRefcount() { return refcount; }
};


class IClip;
class PClip;
class PVideoFrame;
class IScriptEnvironment;
class AVSValue;


// VideoFrame holds a "window" into a VideoFrameBuffer.  Operator new
// is overloaded to recycle class instances.

class VideoFrame {
    volatile long refcount;
    VideoFrameBuffer* const vfb;
    const int offset, pitch, row_size, height, offsetU, offsetV, pitchUV;  // U&V offsets are from top of picture.

    friend class PVideoFrame;
    void AddRef() { InterlockedIncrement(&refcount); }
    void Release() { VideoFrameBuffer* vfb_local = vfb; if (!InterlockedDecrement(&refcount)) InterlockedDecrement(&vfb_local->refcount); }

    friend class Cache;
    friend class CacheMT;
    friend class ScriptEnvironment;

    VideoFrame(VideoFrameBuffer* _vfb, int _offset, int _pitch, int _row_size, int _height);
    VideoFrame(VideoFrameBuffer* _vfb, int _offset, int _pitch, int _row_size, int _height, int _offsetU, int _offsetV, int _pitchUV);

#ifndef _WIN64
    void* operator new(unsigned size);
#else
    void* operator new(size_t size);
#endif
    // TESTME: OFFSET U/V may be switched to what could be expected from AVI standard!
public:
    int GetPitch() const { return pitch; }
    int GetPitch(int plane) const { switch (plane) {case PLANAR_U: case PLANAR_V: return pitchUV;} return pitch; }
    int GetRowSize() const { return row_size; }
    __declspec(noinline) int GetRowSize(int plane) const {
        switch (plane) {
        case PLANAR_U: case PLANAR_V: if (pitchUV) return row_size>>1; else return 0;
        case PLANAR_U_ALIGNED: case PLANAR_V_ALIGNED:
            if (pitchUV) {
                int r = ((row_size+FRAME_ALIGN-1)&(~(FRAME_ALIGN-1)) )>>1; // Aligned rowsize
                if (r<=pitchUV)
                    return r;
                return row_size>>1;
            } else return 0;
        case PLANAR_Y_ALIGNED:
            int r = (row_size+FRAME_ALIGN-1)&(~(FRAME_ALIGN-1)); // Aligned rowsize
            if (r<=pitch)
                return r;
            return row_size;
        }
        return row_size; }
    int GetHeight() const { return height; }
    int GetHeight(int plane) const {  switch (plane) {case PLANAR_U: case PLANAR_V: if (pitchUV) return height>>1; return 0;} return height; }

    // generally you shouldn't use these three
    VideoFrameBuffer* GetFrameBuffer() const { return vfb; }
    int GetOffset() const { return offset; }
    int GetOffset(int plane) const { switch (plane) {case PLANAR_U: return offsetU;case PLANAR_V: return offsetV;default: return offset;}; }

    // in plugins use env->SubFrame()
    //If you really want to use these remember to increase vfb->refcount before calling and decrement it afterwards.
    VideoFrame* Subframe(int rel_offset, int new_pitch, int new_row_size, int new_height) const;
    VideoFrame* Subframe(int rel_offset, int new_pitch, int new_row_size, int new_height, int rel_offsetU, int rel_offsetV, int pitchUV) const;


    const BYTE* GetReadPtr() const { return vfb->GetReadPtr() + offset; }
    const BYTE* GetReadPtr(int plane) const { return vfb->GetReadPtr() + GetOffset(plane); }

    bool IsWritable() const { return (refcount == 1 && vfb->refcount == 1); }

    BYTE* GetWritePtr() const {
        if (vfb->GetRefcount()>1) {
            _ASSERT(FALSE);
            //throw AvisynthError("Internal Error - refcount was more than one!");
        }
        return IsWritable() ? (vfb->GetWritePtr() + offset) : 0;
    }

    BYTE* GetWritePtr(int plane) const {
        if (plane==PLANAR_Y) {
            if (vfb->GetRefcount()>1) {
                _ASSERT(FALSE);
                //        throw AvisynthError("Internal Error - refcount was more than one!");
            }
            return IsWritable() ? vfb->GetWritePtr() + GetOffset(plane) : 0;
        }
        return vfb->data + GetOffset(plane);
    }

    ~VideoFrame() { VideoFrameBuffer* vfb_local = vfb; if (InterlockedDecrement(&refcount) >= 0) InterlockedDecrement(&vfb_local->refcount); }
};

enum {
    CACHE_NOTHING=0,
    CACHE_RANGE=1,
    CACHE_ALL=2,
    CACHE_AUDIO=3,
    CACHE_AUDIO_NONE=4,
    CACHE_AUDIO_AUTO=5
};

// Base class for all filters.
class IClip {
    friend class PClip;
    friend class AVSValue;
    volatile long refcnt;
    void AddRef() { InterlockedIncrement(&refcnt); }
    void Release() { if (!InterlockedDecrement(&refcnt)) delete this; }
public:
    IClip() : refcnt(0) {}

    virtual int __stdcall GetVersion() { return AVISYNTH_INTERFACE_VERSION; }

    virtual PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env) = 0;
    virtual bool __stdcall GetParity(int n) = 0;  // return field parity if field_based, else parity of first field in frame
    virtual void __stdcall GetAudio(void* buf, __int64 start, __int64 count, IScriptEnvironment* env) = 0;  // start and count are in samples
    virtual void __stdcall SetCacheHints(int cachehints,int frame_range) = 0 ;  // We do not pass cache requests upwards, only to the next filter.
    virtual const VideoInfo& __stdcall GetVideoInfo() = 0;
#if defined(__INTEL_COMPILER)
    virtual ~IClip() {}
#else
    virtual __stdcall ~IClip() {}
#endif
};


// smart pointer to IClip
class PClip {

    IClip* p;

    IClip* GetPointerWithAddRef() const { if (p) p->AddRef(); return p; }
    friend class AVSValue;
    friend class VideoFrame;

    void Init(IClip* x) {
        if (x) x->AddRef();
        p=x;
    }
    void Set(IClip* x) {
        if (x) x->AddRef();
        if (p) p->Release();
        p=x;
    }

public:
    PClip() { p = 0; }
    PClip(const PClip& x) { Init(x.p); }
    PClip(IClip* x) { Init(x); }
    void operator=(IClip* x) { Set(x); }
    void operator=(const PClip& x) { Set(x.p); }

    IClip* operator->() const { return p; }

    // useful in conditional expressions
    operator void*() const { return p; }
    bool operator!() const { return !p; }

    ~PClip() { if (p) p->Release(); }
};


// smart pointer to VideoFrame
class PVideoFrame {

    VideoFrame* p;

    void Init(VideoFrame* x) {
        if (x) x->AddRef();
        p=x;
    }
    void Set(VideoFrame* x) {
        if (x) x->AddRef();
        if (p) p->Release();
        p=x;
    }

public:
    PVideoFrame() { p = 0; }
    PVideoFrame(const PVideoFrame& x) { Init(x.p); }
    PVideoFrame(VideoFrame* x) { Init(x); }
    void operator=(VideoFrame* x) { Set(x); }
    void operator=(const PVideoFrame& x) { Set(x.p); }

    VideoFrame* operator->() const { return p; }

    // for conditional expressions
    operator void*() const { return p; }
    bool operator!() const { return !p; }

    ~PVideoFrame() { if (p) p->Release();}
};


class AVSValue {
public:

    AVSValue() { type = 'v'; }
    AVSValue(IClip* c) { type = 'c'; clip = c; if (c) c->AddRef(); }
    AVSValue(const PClip& c) { type = 'c'; clip = c.GetPointerWithAddRef(); }
    AVSValue(bool b) { type = 'b'; boolean = b; }
    AVSValue(int i) { type = 'i'; integer = i; }
    //  AVSValue(__int64 l) { type = 'l'; longlong = l; }
    AVSValue(float f) { type = 'f'; floating_pt = f; }
    AVSValue(double f) { type = 'f'; floating_pt = float(f); }
    AVSValue(const char* s) { type = 's'; string = s; }
    AVSValue(const AVSValue* a, int size) { type = 'a'; array = a; array_size = size; }
    AVSValue(const AVSValue& v) { Assign(&v, true); }

    ~AVSValue() { if (IsClip() && clip) clip->Release(); }
    AVSValue& operator=(const AVSValue& v) { Assign(&v, false); return *this; }

    // Note that we transparently allow 'int' to be treated as 'float'.
    // There are no int<->bool conversions, though.

    bool Defined() const { return type != 'v'; }
    bool IsClip() const { return type == 'c'; }
    bool IsBool() const { return type == 'b'; }
    bool IsInt() const { return type == 'i'; }
    //  bool IsLong() const { return (type == 'l'|| type == 'i'); }
    bool IsFloat() const { return type == 'f' || type == 'i'; }
    bool IsString() const { return type == 's'; }
    bool IsArray() const { return type == 'a'; }

    PClip AsClip() const { _ASSERTE(IsClip()); return IsClip()?clip:0; }
    bool AsBool() const { _ASSERTE(IsBool()); return boolean; }
    int AsInt() const { _ASSERTE(IsInt()); return integer; }
    //  int AsLong() const { _ASSERTE(IsLong()); return longlong; }
    const char* AsString() const { _ASSERTE(IsString()); return IsString()?string:0; }
    double AsFloat() const { _ASSERTE(IsFloat()); return IsInt()?integer:floating_pt; }

    bool AsBool(bool def) const { _ASSERTE(IsBool()||!Defined()); return IsBool() ? boolean : def; }
    int AsInt(int def) const { _ASSERTE(IsInt()||!Defined()); return IsInt() ? integer : def; }
    double AsFloat(double def) const { _ASSERTE(IsFloat()||!Defined()); return IsInt() ? integer : type=='f' ? floating_pt : def; }
    const char* AsString(const char* def) const { _ASSERTE(IsString()||!Defined()); return IsString() ? string : def; }

    int ArraySize() const { _ASSERTE(IsArray()); return IsArray()?array_size:1; }

    const AVSValue& operator[](int index) const {
        _ASSERTE(IsArray() && index>=0 && index<array_size);
        return (IsArray() && index>=0 && index<array_size) ? array[index] : *this;
    }

private:

    short type;  // 'a'rray, 'c'lip, 'b'ool, 'i'nt, 'f'loat, 's'tring, 'v'oid, or 'l'ong
    short array_size;
    union {
        IClip* clip;
        bool boolean;
        int integer;
        float floating_pt;
        const char* string;
        const AVSValue* array;
        //    __int64 longlong;
    };

    void Assign(const AVSValue* src, bool init) {
        if (src->IsClip() && src->clip)
            src->clip->AddRef();
        if (!init && IsClip() && clip)
            clip->Release();
        // make sure this copies the whole struct!
        /* UGH! what the- ?
        ((__int32*)this)[0] = ((__int32*)src)[0];
        ((__int32*)this)[1] = ((__int32*)src)[1];
        */
        this->clip = src->clip;
        this->type = src->type;
        this->array_size = src->array_size;
    }
};


// instantiable null filter
class GenericVideoFilter : public IClip {
protected:
    PClip child;
    VideoInfo vi;
public:
    GenericVideoFilter(PClip _child) : child(_child) { vi = child->GetVideoInfo(); }
    PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env) { return child->GetFrame(n, env); }
    void __stdcall GetAudio(void* buf, __int64 start, __int64 count, IScriptEnvironment* env) { child->GetAudio(buf, start, count, env); }
    const VideoInfo& __stdcall GetVideoInfo() { return vi; }
    bool __stdcall GetParity(int n) { return child->GetParity(n); }
    void __stdcall SetCacheHints(int cachehints,int frame_range) { } ;  // We do not pass cache requests upwards, only to the next filter.
};





/* Helper classes useful to plugin authors */

class AlignPlanar : public GenericVideoFilter
{
public:
    AlignPlanar(PClip _clip);
    static PClip Create(PClip clip);
    PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env);
};



class FillBorder : public GenericVideoFilter
{
public:
    FillBorder(PClip _clip);
    static PClip Create(PClip clip);
    PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env);
};



class ConvertAudio : public GenericVideoFilter
    /**
    * Helper class to convert audio to any format
    **/
{
public:
    ConvertAudio(PClip _clip, int prefered_format);
    void __stdcall GetAudio(void* buf, __int64 start, __int64 count, IScriptEnvironment* env);
    void __stdcall SetCacheHints(int cachehints,int frame_range);  // We do pass cache requests upwards, to the cache!

    static PClip Create(PClip clip, int sample_type, int prefered_type);
    static AVSValue __cdecl Create_float(AVSValue args, void*, IScriptEnvironment*);
    static AVSValue __cdecl Create_32bit(AVSValue args, void*, IScriptEnvironment*);
    static AVSValue __cdecl Create_24bit(AVSValue args, void*, IScriptEnvironment*);
    static AVSValue __cdecl Create_16bit(AVSValue args, void*, IScriptEnvironment*);
    static AVSValue __cdecl Create_8bit (AVSValue args, void*, IScriptEnvironment*);
    static AVSValue __cdecl Create_Any  (AVSValue args, void*, IScriptEnvironment*);
    virtual ~ConvertAudio();

private:
    void convertToFloat(char* inbuf, float* outbuf, char sample_type, int count);
    void convertToFloat_3DN(char* inbuf, float* outbuf, char sample_type, int count);
    void convertToFloat_SSE(char* inbuf, float* outbuf, char sample_type, int count);
    void convertToFloat_SSE2(char* inbuf, float* outbuf, char sample_type, int count);
    void convertFromFloat(float* inbuf, void* outbuf, char sample_type, int count);
    void convertFromFloat_3DN(float* inbuf, void* outbuf, char sample_type, int count);
    void convertFromFloat_SSE(float* inbuf, void* outbuf, char sample_type, int count);
    void convertFromFloat_SSE2(float* inbuf, void* outbuf, char sample_type, int count);

    __inline int Saturate_int8(float n);
    __inline short Saturate_int16(float n);
    __inline int Saturate_int24(float n);
    __inline int Saturate_int32(float n);

    char src_format;
    char dst_format;
    int src_bps;
    char *tempbuffer;
    SFLOAT *floatbuffer;
    int tempbuffer_size;
};


// For GetCPUFlags.  These are backwards-compatible with those in VirtualDub.
enum {
    /* slowest CPU to support extension */
    CPUF_FORCE        =  0x01,   //  N/A
    CPUF_FPU          =  0x02,   //  386/486DX
    CPUF_MMX          =  0x04,   //  P55C, K6, PII
    CPUF_INTEGER_SSE  =  0x08,   //  PIII, Athlon
    CPUF_SSE          =  0x10,   //  PIII, Athlon XP/MP
    CPUF_SSE2         =  0x20,   //  PIV, Hammer
    CPUF_3DNOW        =  0x40,   //  K6-2
    CPUF_3DNOW_EXT    =  0x80,   //  Athlon
    CPUF_X86_64       =  0xA0,   //  Hammer (note: equiv. to 3DNow + SSE2, which
    //          only Hammer will have anyway)
    CPUF_SSE3         = 0x100,   //  PIV+, Hammer
    CPUF_SSSE3        = 0x200,   //  prescott?
    CPUF_SSE4         = 0x400,   //  penryn
    CPUF_SSE4_2       = 0x800    //  Core iX
};

//josh: changed these just bc winsdk defines them in BaseTsd.h
#define MAX_INT MAXINT32
#define MIN_INT MININT32  // ::FIXME:: research why this is not 0x80000000



class IClipLocalStorage;

class IScriptEnvironment {
public:
#if defined(__INTEL_COMPILER)
    virtual ~IScriptEnvironment() {}
#else
    virtual __stdcall ~IScriptEnvironment() {}
#endif

    virtual /*static*/ long __stdcall GetCPUFlags() = 0;

    virtual char* __stdcall SaveString(const char* s, int length = -1) = 0;
    virtual char* __stdcall Sprintf(const char* fmt, ...) = 0;
    // note: val is really a va_list; I hope everyone typedefs va_list to a pointer
    virtual char* __stdcall VSprintf(const char* fmt, void* val) = 0;

    __declspec(noreturn) virtual void __stdcall ThrowError(const char* fmt, ...) = 0;

    class NotFound /*exception*/ {};  // thrown by Invoke and GetVar

    typedef AVSValue (__cdecl *ApplyFunc)(AVSValue args, void* user_data, IScriptEnvironment* env);

    virtual void __stdcall AddFunction(const char* name, const char* params, ApplyFunc apply, void* user_data) = 0;
    virtual bool __stdcall FunctionExists(const char* name) = 0;
    virtual AVSValue __stdcall Invoke(const char* name, const AVSValue args, const char** arg_names=0) = 0;

    virtual AVSValue __stdcall GetVar(const char* name) = 0;
    virtual bool __stdcall SetVar(const char* name, const AVSValue& val) = 0;
    virtual bool __stdcall SetGlobalVar(const char* name, const AVSValue& val) = 0;

    virtual void __stdcall PushContext(int level=0) = 0;
    virtual void __stdcall PopContext() = 0;

    // align should be 4 or 8
    virtual PVideoFrame __stdcall NewVideoFrame(const VideoInfo& vi, int align=FRAME_ALIGN) = 0;

    virtual bool __stdcall MakeWritable(PVideoFrame* pvf) = 0;

    virtual /*static*/ void __stdcall BitBlt(BYTE* dstp, int dst_pitch, const BYTE* srcp, int src_pitch, int row_size, int height) = 0;

    typedef void (__cdecl *ShutdownFunc)(void* user_data, IScriptEnvironment* env);
    virtual void __stdcall AtExit(ShutdownFunc function, void* user_data) = 0;

    virtual void __stdcall CheckVersion(int version = AVISYNTH_INTERFACE_VERSION) = 0;

    virtual PVideoFrame __stdcall Subframe(PVideoFrame src, int rel_offset, int new_pitch, int new_row_size, int new_height) = 0;

    virtual int __stdcall SetMemoryMax(int mem) = 0;

    virtual int __stdcall SetWorkingDir(const char * newdir) = 0;

    virtual void* __stdcall ManageCache(int key, void* data) = 0;

    enum PlanarChromaAlignmentMode {
        PlanarChromaAlignmentOff,
        PlanarChromaAlignmentOn,
        PlanarChromaAlignmentTest };

        virtual bool __stdcall PlanarChromaAlignment(PlanarChromaAlignmentMode key) = 0;

        virtual PVideoFrame __stdcall SubframePlanar(PVideoFrame src, int rel_offset, int new_pitch, int new_row_size, int new_height, int rel_offsetU, int rel_offsetV, int new_pitchUV) = 0;

        virtual void __stdcall SetMTMode(int mode,int threads,bool temporary)=0;
        virtual int __stdcall  GetMTMode(bool return_nthreads)=0;

        virtual IClipLocalStorage* __stdcall AllocClipLocalStorage()=0;

        virtual void __stdcall SaveClipLocalStorage()=0;
        virtual void __stdcall RestoreClipLocalStorage()=0;
};


// avisynth.dll exports this; it's a way to use it as a library, without
// writing an AVS script or without going through AVIFile.
IScriptEnvironment* __stdcall CreateScriptEnvironment(int version = AVISYNTH_INTERFACE_VERSION);


#pragma pack(pop)

#endif //__AVISYNTH_H__
